ESC-DSS version 1.7 costs £100 and is available from:
Duncan Ray
Centre for Human and Ecological Sciences
Forest Research
Northern Research Station
Roslin
Midlothian EH25 9SY
Tel: +44(0)131 445 6980
Fax: +44(0)131 445 7335
Email: duncan.ray@forestry.gsi.gov.uk
